noun. 
                    The act of hiding or concealing, or the state of being hidden or concealed; especially, the hiding of one body from sight by another; specifically, in astronomy, the hiding of a star or planet from sight by its passing behind some other of the heavenly bodies. It is particularly applied to the eclipse of a fixed star by the moon.
                  
                
                  
                    noun. 
                    Figuratively, disappearance from view; withdrawal from notice.